I think the cardinal sin of moving the needle with something you care about is not showing up at all.
Because what gets done if you are not even in the building trying?
Understand: Showing up happens to work.
“If you need rest, you go to sleep earlier. You don’t sleep in, and you don’t miss workouts. Even if you can’t perform at a high level, showing up and doing something is still a thousand times better than not showing up at all.”
-Jocko Willink, The Way Of The Warrior Kid